Commentaries are wonderful tools for sermon preparation. I often get new insight or find little nuances by consulting commentaries. Commentaries come in many varieties. There are one volume commentaries for quick access and easy use. They also don’t take up as much space on the bookshelf. Then there are the multi-volume commentary sets, usually containing commentary on only one or two books of the Bible per volume. In many cases, multi-volume commentaries go much deeper into the text, often with in-depth exposition of Greek or Hebrew. A good commentary or commentary set should be the goal of a pastor.